gistfile1.js

function setCurrentUserFilter() {
  Ext.Ajax.request({
    url: "/convs/current_user_to_json",
    success: function(transport) {
      var response = Ext.decode(transport.responseText);
      alert("received response!");
      alert("setting response to: " + response);
      user_combo.setValue(response);
    }
  });
}